I am interested to exchange some experience with the new My Book Live.
The box is very fast, quiet and relative eco-efficient.

What I have discovered so far:

First step is to open the access via ssh - either via the download config-file -> amend -> upload config file but be aware to do it from another linux, cause the file structure is quite sensitive to changes - or via the hidden web http://mybooklive/ui/ssh. Login first and then go to the hidden site. The password is written on the site too.

After getting access to the box I discovered a Lenny Debian - not whole distribution and an amended one for the NAS. CPU — Power PC.

First thing I did, was to disable the Twonky Server as this one lead to some problems (to many files, different media formats etc.).
I installed MiniDLNA instead. This works fine - is much smaller, though less features and no web access.

Next I installed webmin to the box to get some graphical access to the box, but with much more features.
No I can amend nearly all of the features the box carry by default or I had installed previously.

One thing regarding webmin made me some headache - after installing webmin, the standby of the box (i.e. drive) didn't work anymore.
After some time I discovered that the box uses a RAM-Disk for all logging - quite similar to the enhancements for the older MBWE -> lookup in the web.
After changing all logs to the /var/log folder and disabling the search for updates by webmin the system went into standby as used to do before.

So make sure any installed prog will use the /var/log folder for logging.

Next issues for me are to get a script for rsync the data with my backup server and enabling nfs support for the WD TV Live. A further interesting feature would be to WeDav support (via the istalled apache2 - server).

So far from my side. As I said I am very interested to discuss your experience with the box.

mm, interesting.
You said did you installed custom things on it. How did you did that?
Compiled directly on NAS ? (I believe gcc is not included by default) or did you crosscompiled on other box? Or used apt-get or some optware feed?
Need more details about it, please.

I am reluctant to run apt-get update when there's a mixture of stable and unstable installed, and both are referred to in apt/sources.list

At least a few things look to be installable without much fuss, rtorrent has very few dependencies for example. Rsync is already present, so rsnapshot shouldn't be too difficult. Netfilter is missing from the kernel, I'm not sure how much trouble it's going to be to replace this. Building an entire distribution from scratch may actually be easier than messing around with the existing configuration.

Prior to doing anything dramatic I'm backing up the drive though, in order to recover it to the present condition if need be. This is taking a while, so I have nothing constructive to report yet.

Well you are right. At least you can test the update before. Actually I was less careful as you and took the plunge. I run into some (at least for me) strange questions during the update - but! I got at least a normal running system. After installing Webmin I recognized a open issue with some driver / library. I can not recall what it was, but I had to solve the issue manually - downloading the respective version (unstable) etc.
But that was just one problem.
I got a similar issue as I tried to install Fuse to mount FTP-Shares. Actually I removed the "incomplete" installation after I found another way to do my business. Further research still necessary.

I might to add that I got my rsysnc script running - no I can very easily make backups to my rsync-server based on Freenas. Very fast! The Freenas is reporting about >12MB/s.

I also installed lftp back to the device as this client as a lot of capabilities I missed in the default one.

The NFS sharing of my media files to the WD TV Live works also perfectly fine.

The only issue still missing is WebDav. But I guess I have to learn a little bit more about the Apache2 before I try it again. I think I have to be very careful there, not to open any access to the device without appropriate security in place.

Another thing I was not aware of is the problem of the strange behavior of the WD Green HDD in terms of parking heads to often (every 8 sec.). If there is a solution around I would be very happy to know about, cause the drive contains a lot of sensitive data.

1. could you upload pre-build miniDNLA binaries to some location?
2. as I understand you installed bin-utils and gcc directly to device? How much space it eaten? I Mean how much free mb you now have on root fs ?

1. no - as it is very simple to compile it with the manual provided - very simple!!
2. the root fs is about 1.9 GB. Usage after all my above installations and some updates of Debian I have still 240 MB free. Not much, but enough for me, as I basically finished - considering Transmission and WebDav (hardly any space used) to be enabled.

If you don't use the Window Install program in the admin-site than you can delete them in /www-.
I don't knowe the right path any more. I Don't use the admin-site so I have delete the whole /www and make a new one voor a small site.
You win more than 300MB in /dev/sda1.

I am wondering if we can find the content of the u-boot image.
I gathered these general information but am unable to apply anything to the u-boot image.
It seems that first we need to decode the u-boot image header.

After make changes in .conf file and ran the minidlna everything seems good. But when I'm looking in my xbox 360 it doesn't appear, and when I make a "netstat -nlp | grep minidlna" do nothing. And the ps commando neither show the process.

Now I tried with other option: Optware, when I install minidlna with optware apparently the results are better, when I make a "netstat -nlp | grep minidlna" it shows this:

Even in the .conf file i have the presentation URL to: 192.168.1.5:8200 the netstat says 0.0.0.0:8200, and the ps command show me the minidlna run in background, but one more time my Xbox doesn't see it.